His research work at Harvard led to the discovery of a family of DNA modificationenzymes that establish DNA methylation patterns of the human genome.
沿着他在哈佛的科研方向，后人发现了一族DNA修饰酶，这些酶能使人类染色体呈现多种甲基型态。
2
Genetic modification can be used to cut out selected pieces of DNA (or genes) using special enzymes.
基因改造，就是借助某种特别的酶，删除选中基因片段。
3
The preliminary conclusion is that the protein is synthesized by the yeast cells and its antibacterial activity is significantly improved through modification by bacteria enzymes.